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CN116901737A - Battery charging circuit, method and device and vehicle - Google Patents

Battery charging circuit, method and device and vehicle Download PDF

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Publication number
CN116901737A
CN116901737A CN202311036109.6A CN202311036109A CN116901737A CN 116901737 A CN116901737 A CN 116901737A CN 202311036109 A CN202311036109 A CN 202311036109A CN 116901737 A CN116901737 A CN 116901737A
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CN
China
Prior art keywords
battery
heating
heating mode
charging
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311036109.6A
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Chinese (zh)
Inventor
宋德儒
罗文辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiaomi Automobile Technology Co Ltd
Original Assignee
Xiaomi Automobile Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiaomi Automobile Technology Co Ltd filed Critical Xiaomi Automobile Technology Co Ltd
Priority to CN202311036109.6A priority Critical patent/CN116901737A/en
Publication of CN116901737A publication Critical patent/CN116901737A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present disclosure relates to a battery charging circuit, method, apparatus and vehicle, the battery charging circuit comprising a processor, a heating assembly, a charging assembly, a control switch assembly, and a power battery of the vehicle; the processor is used for acquiring the battery temperature and the battery electric quantity of the vehicle power battery, and determining a target heating mode from a plurality of preset heating modes corresponding to the heating assembly by controlling the control switch assembly according to the battery electric quantity under the condition that the battery temperature is determined to be smaller than or equal to a first preset temperature threshold value, wherein the target heating mode at least comprises a PTC heating mode corresponding to the PTC heater; and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, controlling the switch assembly to charge the power battery by the charging assembly; the heating assembly is used for heating the power battery according to the target heating mode according to the control switch assembly; and the charging assembly is used for charging the power battery.

Description

Battery charging circuit, method and device and vehicle
Technical Field
The disclosure relates to the technical field of batteries, and in particular relates to a battery charging circuit, a method and a device and a vehicle.
Background
With the development of automobile technology, for an electric automobile, the charging speed gradually becomes a brake elbow of the development of the electric automobile, and particularly, the problem that the battery performance is reduced due to the fact that the battery temperature is reduced in a low-temperature environment in winter is solved, so that the charging performance of the battery automobile is affected. Therefore, it is a critical requirement to rapidly heat the battery before charging.
In the related art, the battery may be heated by adding a heating module to the battery to increase the charging speed of the battery. But adopt single heating module in the heating process, to the heating rate and the inefficiency of battery, can't realize the rapid heating to the battery, can't improve charging efficiency, be unfavorable for improving user experience.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a battery charging circuit, a method, an apparatus, and a vehicle.
According to a first aspect of embodiments of the present disclosure, there is provided a battery charging circuit including a processor, a heating assembly, a charging assembly, a control switch assembly, and a power battery of a vehicle, the heating assembly, the charging assembly being respectively connected with the power battery, the heating assembly being connected with the control switch assembly, the processor being respectively connected with the heating assembly, the charging assembly, the power battery, and the control switch assembly, the heating assembly including at least a PTC heater;
The processor is configured to obtain a battery temperature and a battery power of a vehicle power battery, and determine, according to the battery power, a target heating mode from a plurality of preset heating modes corresponding to the heating assembly by controlling the control switch assembly when it is determined that the battery temperature is less than or equal to a first preset temperature threshold, where the target heating mode at least includes a PTC heating mode corresponding to the PTC heater; and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, controlling the control switch assembly to enable the charging assembly to charge the power battery;
the heating assembly is used for heating the power battery according to the target heating mode according to the control switch assembly;
and the charging assembly is used for charging the power battery.
Optionally, the battery charging circuit is further configured to be connected to an external power source, wherein the processor and the heating assembly are respectively connected to the external power source;
the processor is further configured to output a constant voltage indication message to the external power supply, where the constant voltage indication message is used to instruct the external power supply connected to the vehicle to periodically output a heating voltage to the heating component, if the battery temperature is determined to be less than or equal to a first preset temperature threshold;
And the heating assembly is used for heating the power battery according to the heating voltage output by the external power supply according to the target heating mode by the control switch assembly.
Optionally, the charging assembly is further configured to connect with the external power source;
the processor is further configured to output a constant current indication message to the external power supply when it is determined that the battery temperature of the power battery is heated to a second preset temperature threshold, where the constant current indication message is configured to instruct the external power supply connected to the vehicle to periodically output a charging current to the vehicle;
and the charging assembly is used for charging the power battery through the charging current output by the external power supply.
Optionally, the heating component further comprises a pulse self-heating component, and the pulse self-heating component adopts a pulse self-heating mode for heating;
the processor is further configured to obtain power information of the external power supply, and determine a target heating mode from a pulse self-heating mode of the pulse self-heating assembly and a PTC heating mode of the PTC heater according to the battery power and the power information, where the target heating mode further includes a heating mode in which the pulse self-heating mode and the PTC heating mode cooperate.
Optionally, the processor is configured to determine, according to the power information, a target heating mode from a pulse self-heating mode of the pulse self-heating component and a PTC heating mode of a PTC heater, in a case where it is determined that the battery power is greater than or equal to a preset power threshold; or,
and taking the PTC heating mode of the PTC heater as a target heating mode under the condition that the battery electric quantity is smaller than a preset electric quantity threshold value.
Optionally, the processor is configured to, in a case where it is determined that the battery power is greater than or equal to a preset power threshold, set a heating mode of the pulse self-heating assembly, which is a heating mode that is co-acting with a PTC heating mode of the PTC heater, as the target heating mode, in a case where it is determined that the power information is greater than or equal to preset power information; or,
and taking the PTC heating mode of the PTC heater as the target heating mode when the power information is determined to be smaller than preset power information.
Optionally, in the case that the target heating mode includes a pulse self-heating mode of the pulse self-heating assembly and a heating mode of the PTC heater which co-act,
The power battery is used for providing a first voltage for the pulse self-heating assembly;
the external power supply is used for providing a second voltage for the PTC heater;
the pulse self-heating assembly is used for heating the power battery according to the first voltage in the pulse self-heating mode;
the PTC heater is used for heating the power battery according to the second voltage through the PTC heating mode.
Optionally, the battery charging circuit further comprises a boost circuit; the booster circuit is connected to the PTC heater and the external power supply, respectively, and in the case of a PTC heating mode including only the PTC heater among the target heating modes,
the boosting circuit is used for boosting the heating voltage output by the external power supply to obtain a boosted third voltage;
and the PTC heater is used for controlling the PTC heater to heat the power battery through the PTC heating mode through the third voltage after boosting.
According to a second aspect of embodiments of the present disclosure, there is provided a battery charging circuit to which the method is applied, the method comprising:
acquiring the battery temperature and the battery electric quantity of a vehicle power battery;
Determining a target heating mode from a plurality of preset heating modes according to the battery power under the condition that the battery temperature is less than or equal to a first preset temperature threshold;
heating the power battery according to the target heating mode, wherein the target heating mode at least comprises a PTC heating mode;
and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, charging the power battery.
Optionally, the battery charging circuit is further configured to connect to an external power source;
the determining a target heating mode from a plurality of preset heating modes according to the battery power comprises:
and outputting a constant voltage indication message to the external power supply, wherein the constant voltage request is used for indicating the external power supply connected with the vehicle to periodically output heating voltage to the vehicle.
Optionally, the heating the power battery according to the target heating mode includes:
and heating the power battery according to the target heating mode by the heating voltage output by the external power supply.
Optionally, the method further comprises:
and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, outputting a constant current indication message to the external power supply, wherein the constant current indication message is used for indicating the external power supply connected with the vehicle to periodically output charging current to the power battery.
Optionally, the target heating mode further includes a heating mode in which a pulse self-heating mode and a PTC heating mode work together;
the determining a target heating mode from a plurality of preset heating modes according to the battery power comprises:
acquiring power information of the external power supply;
and determining a target heating mode from a pulse self-heating mode and a PTC heating mode according to the battery electric quantity and the power information.
Optionally, the determining the target heating mode from the pulse self-heating mode and the PTC heating mode according to the battery charge amount and the power information includes:
determining a target heating mode from the pulse self-heating mode and the PTC heating mode according to the power information under the condition that the battery electric quantity is larger than or equal to a preset electric quantity threshold value;
and under the condition that the battery electric quantity is determined to be smaller than a preset electric quantity threshold value, taking the PTC heating mode as a target heating mode.
Optionally, the determining a target heating mode from the pulse self-heating mode and the PTC heating mode according to the power information includes:
taking a heating mode of the combined action of the pulse self-heating mode and the PTC heating mode as the target heating mode under the condition that the power information is larger than or equal to preset power information;
And in the case that the power information is determined to be smaller than preset power information, taking the PTC heating mode as the target heating mode.
Optionally, the battery charging circuit includes a heating assembly, and the heating the power battery according to the target heating mode includes:
in the case where the target heating mode includes a pulse self-heating mode of the pulse self-heating assembly and a PTC heating mode of the PTC heater cooperate,
providing a first voltage for the heating assembly through the power battery so as to control the heating assembly to heat the power battery according to the first voltage in a pulse self-heating mode; and
and the heating voltage output by the external power supply provides a second voltage for the heating assembly so as to control the heating assembly to heat the power battery according to the second voltage through the PTC heating mode.
Optionally, the battery charging circuit further comprises a boost circuit; in the case of the PTC heating mode including only the PTC heater among the target heating modes,
the heating the power battery according to the target heating mode includes:
Boosting the heating voltage output by the external power supply through the boosting circuit to obtain a boosted third voltage;
and controlling the heating component to heat the power battery through the PTC heating mode through the third voltage.
According to a third aspect of embodiments of the present disclosure, there is provided a battery charging apparatus including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to implement the steps of the battery charging method provided by the second aspect of the present disclosure.
According to a fourth aspect of embodiments of the present disclosure, there is provided a vehicle including the battery charging device provided in the third aspect of the present disclosure.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
through the technical scheme, in the battery charging circuit provided by the disclosure, the battery charging circuit comprises a processor, a heating component, a charging component, a control switch component and a power battery of a vehicle, wherein the heating component and the charging component are respectively connected with the power battery, the heating component is connected with the control switch component, and the processor is respectively connected with the heating component, the charging component, the power battery and the control switch component, and the heating component at least comprises a PTC heater; the processor is configured to obtain a battery temperature and a battery power of a vehicle power battery, and determine, according to the battery power, a target heating mode from a plurality of preset heating modes corresponding to the heating assembly by controlling the control switch assembly when it is determined that the battery temperature is less than or equal to a first preset temperature threshold, where the target heating mode at least includes a PTC heating mode corresponding to the PTC heater; and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, controlling the control switch assembly to enable the charging assembly to charge the power battery; the heating assembly is used for heating the power battery according to the target heating mode according to the control switch assembly; and the charging assembly is used for charging the power battery. Therefore, whether the battery is heated or not can be determined according to the current battery temperature, the target heating mode corresponding to the unused heating component can be selected for heating the power battery according to different electric quantities, the heating efficiency is improved, the PTC heating mode can be fixed into one of the target heating modes, the vehicle can be ensured to have power consumption after being connected with an external power supply, the situation that the external power supply exits overtime under the condition of no charging current output can be prevented, the manual restarting of a charging process can be avoided, the charging efficiency can be improved, and the charging experience of a user is optimized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram of a battery charging circuit according to an exemplary embodiment.
Fig. 2 is a block diagram of another battery charging circuit provided in an exemplary embodiment.
Fig. 3 is a block diagram of another battery charging circuit provided in an exemplary embodiment.
Fig. 4 is a circuit diagram of another battery charging circuit provided by an exemplary embodiment.
Fig. 5 is a flowchart illustrating a method of charging a battery according to an exemplary embodiment.
Fig. 6 is a flowchart illustrating another battery charging method according to an exemplary embodiment.
Fig. 7 is a block diagram of a battery charging device according to an exemplary embodiment.
Fig. 8 is a block diagram of a vehicle, according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
Before describing the specific embodiments of the present disclosure in detail, an application scenario of the present disclosure will be described first. At present, with the development of automobile technology, for an electric automobile, the charging speed gradually becomes a brake elbow of the development of the electric automobile, and particularly, the problem that the charging performance of the battery automobile is affected due to the fact that the battery performance is reduced in a low-temperature environment in winter is solved. Therefore, it is a critical requirement to rapidly heat the battery before charging. In the related art, the battery can be heated by adding a heating module to the battery or by utilizing an electric drive axle module, so that the battery can be heated rapidly, and the performance of the battery is improved.
In a normal case, the PTC heater may be used as a heating module, but when the PTC heater is used to heat the battery, the PTC heater is used as an external heat source, so that the heating rate and efficiency of the battery are low, and rapid heating of the battery cannot be realized; and when the electric drive axle module is adopted to heat the battery, although the internal heating generates heat through the inside of the battery, compared with the external heat source heating, the heating speed is higher, and the heating is also more uniform, but the charging pile is connected with the vehicle at the moment, because the battery of the vehicle is in a pulse self-heating stage, the charging pile is not required to be charged with charging current, the charging pile is not provided with charging current output, the charging pile is further caused to exit overtime, after the battery heating is finished, the charging pile is required to be restarted manually, the charging efficiency is reduced, and the use experience of a user is influenced.
In order to overcome the technical problems in the related art, the disclosure provides a battery charging circuit, a method, a device and a vehicle, which can determine whether to heat a battery according to the current battery temperature, can heat a power battery according to different electric quantities by selecting a target heating mode corresponding to an unused heating component, improve heating efficiency, and can fix a PTC heating mode as one of the target heating modes, so that the vehicle can ensure power consumption after being connected with an external power supply, and can prevent the condition that the external power supply exits overtime under the condition of no charging current output, avoid manual restarting of a charging process, improve charging efficiency and optimize user charging experience.
The present disclosure is described below in connection with specific embodiments.
Fig. 1 is a block diagram of a battery charging circuit according to an exemplary embodiment. As shown in fig. 1, the battery charging circuit 1 includes a processor 11, a heating unit 12, a charging unit 13, a control switch unit 16, and a power battery 14 of a vehicle, the heating unit 12 and the charging unit 13 are respectively connected with the power battery 14, the heating unit 12 is connected with the control switch unit 16, the processor 11 is respectively connected with the heating unit 12, the charging unit 13, the power battery 14, and the control switch unit 16, and the heating unit includes at least a PTC heater 122.
The processor 11 is configured to obtain a battery temperature and a battery power of the vehicle power battery 14, and determine, according to the battery power, a target heating mode from a plurality of preset heating modes corresponding to the heating assembly 12 by controlling the control switch assembly 16 when determining that the battery temperature is less than or equal to a first preset temperature threshold, where the target heating mode includes at least a PTC heating mode corresponding to the PTC heater 122; and in the case that it is determined that the battery temperature of the power battery 14 is heated to the second preset temperature threshold, controlling the control switch assembly 16 so that the charging assembly 13 charges the power battery 14.
The heating assembly 12 is configured to heat the power cell 14 according to the target heating mode in accordance with the control switch assembly 16.
The charging assembly 13 is used for charging the power battery 14.
Wherein the heating assembly 12 may include a pulse self-heating assembly and a PTC heater, the pulse self-heating assembly may include a three-phase motor and a three-phase inverter, the three-phase motor and the three-phase inverter being connected; and the charging assembly 13 may include a connection wire connected to the power battery 14, and a plurality of switches provided on the connection wire.
Illustratively, the processor 11 of the battery charging circuit 1 may be connected to a temperature detection assembly, which may be disposed within a preset range of the power battery 14, for detecting a current real-time temperature of the power battery 14 and transmitting an acquired battery temperature signal to the processor 11 through a transmission wire; the processor 11 then determines, from the received battery temperature signal and from the obtained battery charge signal of the connected power battery 14, a target heating mode from among a plurality of preset heating modes corresponding to the heating assembly 12 according to the battery charge in the case where the battery temperature is less than or equal to a first preset temperature threshold, wherein the target heating mode includes at least the PTC heating mode corresponding to the PTC heater, and then may determine, from among the pulse self-heating assembly and the PTC heater, a target heating assembly corresponding to the target heating mode, which includes at least the PTC heater according to the target heating mode, and then the processor 11 may charge the power battery 14 by controlling the control switch assembly 16 such that the heating assembly 12 heats the power battery 14 in the target heating mode, and then may charge the power battery 14 by controlling the control switch assembly 16 in the case where it is determined that the battery temperature of the power battery 14 is heated to a second preset temperature threshold.
Through the above technical solution, in the battery charging circuit 1 provided in the present disclosure, the battery charging circuit 1 includes a processor 11, a heating component 12, a charging component 13, a control switch component 16, and a power battery 14 of a vehicle, the heating component 12 and the charging component 13 are respectively connected with the power battery 14, the heating component 12 is connected with the control switch component 16, the processor 11 is respectively connected with the heating component 12, the charging component 13, the power battery 14, and the control switch component 16, and the heating component at least includes a PTC heater; the processor 11 is configured to obtain a battery temperature and a battery power of the vehicle power battery 14, and determine, according to the battery power, a target heating mode from a plurality of preset heating modes corresponding to the heating assembly 12 by controlling the control switch assembly 16 when determining that the battery temperature is less than or equal to a first preset temperature threshold, where the target heating mode includes at least a PTC heating mode corresponding to the PTC heater; and in the event that it is determined that the battery temperature of the power battery 14 is heated to a second preset temperature threshold, causing the charging assembly 13 to charge the power battery 14 by controlling the control switch assembly 16; the heating assembly 12 is used for heating the power battery 14 according to the target heating mode according to the control switch assembly 16; the charging assembly 13 is used for charging the power battery 14. Therefore, whether the battery is heated or not can be determined according to the current battery temperature, the target heating mode corresponding to the unused heating component can be selected for heating the power battery according to different electric quantities, the heating efficiency is improved, the PTC heating mode can be fixed into one of the target heating modes, the vehicle can be ensured to have power consumption after being connected with an external power supply, the situation that the external power supply exits overtime under the condition of no charging current output can be prevented, the manual restarting of a charging process can be avoided, the charging efficiency can be improved, and the charging experience of a user is optimized.
In some embodiments, considering that the charging pile is connected to the vehicle, because the battery temperature of the power battery 14 of the vehicle is low, battery heating is required, in the heating process, because no current is required to be sent to the charging pile, the charging pile has no current output, and further the charging pile is caused to exit overtime, after the battery heating is completed, the charging pile needs to be restarted manually, so that the charging efficiency is reduced, and the user experience is affected.
Therefore, another battery charging circuit is proposed, fig. 2 is a block diagram of another battery charging circuit provided in an exemplary embodiment, and as shown in fig. 2, the battery charging circuit 1 is further used for being connected to an external power source 15, and the processor 11 and the heating component 12 are respectively connected to the external power source 15.
Wherein the processor 11 is further configured to output a constant voltage indication message to the external power source 15 in case that the battery temperature is determined to be less than or equal to a first preset temperature threshold, the constant voltage indication message being configured to instruct the external power source 15 connected to the vehicle to periodically output a heating voltage to the heating assembly 12.
The heating unit 12 is configured to heat the power battery 14 according to the target heating mode by the heating voltage output from the external power source 15 according to the control switch unit 16.
For example, the processor 11 may output a constant voltage indication message to the external power source 15 connected thereto in case it is determined that the battery temperature is less than or equal to a first preset temperature threshold value according to the battery temperature detected by the temperature detection means, wherein the constant voltage indication message is used to instruct the external power source 15 connected to the vehicle to periodically output a heating voltage to the heating means 12, and then the external power source 15 may output the heating voltage to the heating means 12 in case it receives the constant voltage indication message, and secondly the heating means 12 may heat the power battery 14 in accordance with the target heating mode and the heating voltage output by the external power source 15 by the control switch means 16.
By adopting the technical scheme, the battery can be connected with the external power supply 15, and under the condition that the battery temperature of the battery is small, the constant voltage indication message is sent to the external power supply 15, so that the power battery 14 can be heated by the external power supply 15 at first, the battery temperature can be increased, and the charging rate can be increased in the subsequent charging process.
In some embodiments, the charging assembly 13 is also configured to connect to the external power source 15.
Wherein the processor 11 is further configured to, in a case where it is determined that the battery temperature of the power battery 14 is heated to a second preset temperature threshold, output a constant current indication message to the external power source 15, where the constant current indication message is used to instruct the external power source 15 connected to the vehicle to periodically output a charging current to the vehicle;
the charging assembly 13 is configured to charge the power battery 14 by the charging current output from the external power source 15.
For example, the processor 11 may output a constant current indication message to the connected external power source 15 in case it is determined that the battery temperature of the power battery 14 is heated to a second preset temperature threshold value according to the battery temperature detected by the temperature detection assembly, wherein the constant current indication message is used to instruct the external power source 15 connected to the vehicle to periodically output a charging current to the vehicle, and then the external power source 15 may output the charging current to the charging assembly 13 in case it receives the constant current indication message, and secondly, the charging assembly 13 may charge the power battery 14 according to the received charging control signal and the charging current output by the external power source 15.
By adopting the technical scheme, the constant current indication message can be actively sent to the connected external power supply 15 under the condition that the battery temperature reaches the second preset temperature threshold, so that the condition that the external power supply 15 exits overtime under the condition of no charging current output after heating is finished can be prevented, the manual restarting of the charging process can be avoided, the charging efficiency can be improved, and the charging experience of a user is optimized.
Fig. 3 is a block diagram of another battery charging circuit according to an exemplary embodiment, and as shown in fig. 3, the heating assembly 12 further includes a self-heating pulse assembly 121, and the self-heating pulse assembly 121 heats in a self-heating pulse mode.
The processor 11 is further configured to acquire power information of the external power source 15, and determine a target heating mode from the pulse self-heating mode of the pulse self-heating assembly 121 and the PTC heating mode of the PTC heater 122 according to the battery power and the power information.
Wherein the target heating mode further includes a heating mode in which the pulse self-heating module 121 and the PTC heater 122 cooperate, the pulse self-heating module 121 and the PTC heater 122 are connected through a control switch, a common terminal of the control switch is connected to the PTC heater 122, a first terminal of the control switch is connected to the external power source 15, and a second terminal of the control switch is connected between the pulse self-heating module 121 and the power battery 14.
Alternatively, the pulse self-heating assembly 121 includes a three-phase motor and a three-phase inverter, and the three-phase motor is connected to the three-phase inverter. The connection point of the three-phase coils of the three-phase motor is connected with the first end of the external power supply 15, and the three-phase coils of the three-phase motor are respectively connected with the midpoints of the three-phase bridge arms of the three-phase inverter; the first and second ends of the three-phase inverter are connected to the positive and negative poles of the power battery 14, respectively.
In this step, in the case where the processor 11 is connected to the external power supply 15, the processor 11 may also acquire power information of the external power supply 15, and first determine that the battery power of the power battery 14 is insufficient from the battery power of the power battery 14, the battery may be heated by a mode in which a heating voltage is input to the PTC heater 122 by the external power supply 15, and in the case where it is determined that the battery power of the power battery 14 is greater than or equal to a preset power threshold, a target heating mode may be determined from among the pulse self-heating mode of the pulse self-heating assembly 121, and the PTC heating mode of the PTC heater 122, based on the power information.
In some embodiments, the processor 11 is configured to determine a target heating mode from the pulse self-heating mode of the pulse self-heating assembly 121 and the PTC heating mode of the PTC heater 122 according to the power information in case it is determined that the battery charge is greater than or equal to a preset charge threshold.
Alternatively, the processor 11 is configured to, in a case where it is determined that the power information is greater than or equal to preset power information, set a heating mode in which the pulse self-heating mode of the pulse self-heating assembly 121 and the PTC heating mode of the PTC heater 122 co-act as the target heating mode; alternatively, in the case where it is determined that the power information is smaller than the preset power information, the PTC heating mode of the PTC heater 122 is taken as the target heating mode.
Illustratively, in the case where the target heating mode includes a pulse self-heating mode of the pulse self-heating assembly 121 and a heating mode of the PTC heater 122 acting in combination, the power battery 14 is configured to supply a first voltage to the pulse self-heating assembly 121; the external power source 15 for supplying a second voltage to the PTC heater 122; the pulse self-heating component 121 is configured to heat the power battery 14 according to the first voltage in the pulse self-heating mode; the PTC heater 122 is configured to heat the power battery 14 according to the second voltage in the PTC heating mode.
By adopting the above technical scheme, the heating mode which is jointly acted by the pulse self-heating mode of the pulse self-heating component 121 and the PTC heating mode of the PTC heater 122 is used as the target heating mode, so that the battery heating efficiency can be improved, and the fact that the vehicle has power consumption after being connected with an external power supply can be guaranteed while the battery heating efficiency is improved, so that the condition that the external power supply exits overtime under the condition of no charging current output is prevented, the manual restarting of the charging process can be avoided, the charging efficiency can be improved, and the charging experience of a user is optimized.
Optionally, the battery charging circuit 1 further comprises a boost circuit; the boost circuit is connected to the PTC heater 122 and the external power supply 15, and is configured to boost the heating voltage output from the external power supply 15 to obtain the boosted third voltage when the target heating mode includes only the PTC heating mode of the PTC heater 122; the PTC heater 122 is configured to control the PTC heater 122 to heat the power battery 14 in the PTC heating mode by the third voltage after boosting.
The boost circuit may be connected between the external power source 15 and the PTC heater 122, and the boost circuit may include a first capacitor and a first inductor, specifically, a first end and a second end of the first capacitor are respectively connected to a first end and a second end of the external power source 15, and a first end and a second end of the first inductor are respectively connected to a first end of the charging port and a connection point of the three-phase coil.
Optionally, the boost circuit further includes a filter, wherein a first end and a second end of the filter are respectively connected to the first end and the second end of the charging port, and a third end and a fourth end of the filter are respectively connected to the first end and the second end of the first capacitor.
Specifically, the filter includes a second inductor, a third inductor, a second capacitor, and a third capacitor, wherein a first end of the second inductor is used as a first end of the filter, a second end of the second inductor is used as a third end of the filter and is connected to the first end of the second capacitor, a first end of the third inductor is used as a second end of the filter, a second end of the third inductor is used as a fourth end of the filter and is connected to the second end of the third capacitor, and the second end of the second capacitor and the first end of the third capacitor are grounded.
Alternatively, in the case where it is determined that the battery charge amount is less than the preset charge amount threshold, the PTC heating mode of the PTC heater 122 may be regarded as the target heating mode.
In some embodiments, fig. 4 is a circuit diagram of another battery charging circuit provided in an exemplary embodiment, and as shown in fig. 4, the battery charging circuit 1 is used for being connected to an external power source 15, and the battery charging circuit 1 may include a boost circuit 18, a pulse self-heating component 121, a PTC heater 122, a power battery 14, a temperature detection component 17, a processor 11, a plurality of switches, and a control switch component 16.
Wherein the boost circuit 18 may include a filter 181, a first capacitor C1, and a first inductance L1, the pulse self-heating assembly 121 may include a three-phase motor 1211 and a three-phase inverter 1212, and a plurality of switches and a control switch assembly 16 may be controlled to be turned on or off by the processor 11; the external power source 15 may include a charging pile in the related art.
The temperature detection component 17 is connected with the processor 11; the first end and the second end of the filter are respectively connected to the first end and the second end of the charging port of the charging pile, the third end and the fourth end of the filter are respectively connected to the first end and the second end of the first capacitor, the first end of the first capacitor is connected to the first end of the first inductor, the second end of the first inductor is connected to the connection point of the three-phase coil, the three-phase coil of the three-phase motor is respectively connected to the midpoint of the three-phase bridge arm of the three-phase inverter, the first end of the three-phase inverter is connected to the positive electrode of the power battery 14 through the second end of the control switch assembly 16, the second end of the three-phase inverter is connected to the negative electrode of the power battery 14 through one end of the PTC heater 122, the first end of the control switch assembly 16 is connected to the second end of the first inductor, the common end of the control switch assembly 16 is connected to the other end of the PTC heater 122, and a plurality of switches can be arranged on the connection paths of the respective devices, the plurality of switches and the control switch assembly 16 can be controlled or turned off by the processor 11, so that the processor 11 can control the plurality of switches and the control the switches 16 to control the states of the plurality of switches 1.
The operation principle of the battery charging circuit 1 in the present embodiment can be explained by the following example.
In the case where the vehicle is connected to a charging pile, the current battery temperature of the power battery 14 may be acquired through the temperature detection assembly 17 provided within a preset range of the power battery 14, the battery charge of the power battery 14 may be acquired if the battery temperature is determined to be less than or equal to a first preset temperature threshold, the switch S5 may be opened if the battery charge is determined to be less than the preset charge threshold, the switches S6 and S7 may be closed, the common end and the first end of the switch assembly 16 may be controlled to be closed, and a constant voltage indication message may be output to the connected charging pile to cause the charging pile to provide the PTC heater 122 with the second voltage, the power battery 14 may be heated by the PTC heater 122, and the switches S3 and S4 may be closed if the battery temperature of the power battery 14 is determined to be heated to the second preset temperature threshold, and a constant current indication message may be output to the charging pile to cause the charging pile to provide the charging current to the power battery 14 to charge the power battery 14.
Or, under the condition that the battery power is determined to be greater than or equal to a preset power threshold, acquiring power information of the external power supply 15, and determining whether the power information is greater than or equal to preset power information according to the power information; in the case that it is determined that the power information is greater than or equal to the preset power information, the switches S5, S6, S7 are closed, the common terminal and the first terminal of the switch assembly 16 are controlled to be closed, and then a constant voltage indication message is outputted to the connected charging post, so that the charging post provides the second voltage to the PTC heater 122, and the power battery 14 provides the first voltage to the pulse self-heating assembly 121, and the power battery 14 is heated by the pulse self-heating assembly 121 and the PTC heater 122 at the same time, and in the case that the battery temperature of the power battery 14 is heated to the second preset temperature threshold, the switches S3, S4 are closed, and a constant current indication message is outputted to the charging post, so that the charging post provides the charging current to the power battery 14, and charges the power battery 14.
Through the above technical solution, in the battery charging circuit 1 provided in the present disclosure, the battery charging circuit 1 includes a processor 11, a heating component 12, a charging component 13, a control switch component 16, and a power battery 14 of a vehicle, the heating component 12 and the charging component 13 are respectively connected with the power battery 14, the heating component 12 is connected with the control switch component 16, the processor 11 is respectively connected with the heating component 12, the charging component 13, the power battery 14, and the control switch component 16, and the heating component at least includes a PTC heater; the processor 11 is configured to obtain a battery temperature and a battery power of the vehicle power battery 14, and determine, according to the battery power, a target heating mode from a plurality of preset heating modes corresponding to the heating assembly 12 by controlling the control switch assembly 16 when determining that the battery temperature is less than or equal to a first preset temperature threshold, where the target heating mode includes at least a PTC heating mode corresponding to the PTC heater; and in the event that it is determined that the battery temperature of the power battery 14 is heated to a second preset temperature threshold, causing the charging assembly 13 to charge the power battery 14 by controlling the control switch assembly 16; the heating assembly 12 is used for heating the power battery 14 according to the target heating mode according to the control switch assembly 16; the charging assembly 13 is used for charging the power battery 14. Therefore, whether the battery is heated or not can be determined according to the current battery temperature, the target heating mode corresponding to the unused heating component can be selected for heating the power battery according to different electric quantities, the heating efficiency is improved, the PTC heating mode can be fixed into one of the target heating modes, the vehicle can be ensured to have power consumption after being connected with an external power supply, the situation that the external power supply exits overtime under the condition of no charging current output can be prevented, the manual restarting of a charging process can be avoided, the charging efficiency can be improved, and the charging experience of a user is optimized.
Fig. 5 is a flowchart illustrating a battery charging method according to an exemplary embodiment, which may be applied to a battery charging circuit including a processor, a heating assembly, a charging assembly, a control switch assembly, and a power battery of a vehicle, the heating assembly, the charging assembly being respectively connected to the power battery, the heating assembly being connected to the control switch assembly, the processor being respectively connected to the heating assembly, the charging assembly, the power battery, and the control switch assembly, the heating assembly including at least a PTC heater, as shown in fig. 5; the method comprises the following steps.
In step S11, a battery temperature and a battery power of a vehicle power battery are acquired.
In this step, a temperature detecting component, for example, a temperature sensor, may be disposed within a preset range of the power battery, where the temperature detecting component is configured to detect a real-time battery temperature of the power battery, and obtain, by using a processor, the real-time battery temperature of the power battery, and obtain a current battery power of the power battery.
In step S12, in the case where it is determined that the battery temperature is less than or equal to the first preset temperature threshold, a target heating mode is determined from among a plurality of preset heating modes according to the battery power.
The heating assembly may employ a plurality of preset heating modes to heat the power battery, for example, the heating assembly may include a pulse self-heating assembly and a PTC heater, the pulse self-heating assembly may employ a pulse self-heating mode, and the PTC heater may employ a PTC heating mode to heat the power battery.
In this step, the processor may determine a target heating mode from among a plurality of preset heating modes corresponding to the heating assembly according to the battery power and may determine a target heating assembly corresponding to the target heating mode from among the pulse self-heating assembly and the PTC heater according to the target heating mode, in case that it is determined that the battery temperature is less than or equal to the first preset temperature threshold.
In step S13, the power battery is heated according to the target heating mode.
Wherein the target heating mode at least comprises a PTC heating mode.
In this step, after determining the target heating module corresponding to the target heating mode, the control switch module may be controlled to determine the target heating mode from a plurality of preset heating modes corresponding to the heating module, so as to control the target heating module to heat the power battery in the target heating mode.
In step S14, the power battery is charged if the battery temperature of the power battery is heated to a second preset temperature threshold.
In this step, the processor may cause the charging assembly to charge the power battery by controlling the control switch assembly in case it is determined that the battery temperature of the power battery is heated to the second preset temperature threshold.
Through the technical scheme, the battery temperature and the battery electric quantity of the vehicle power battery are utilized; determining a target heating mode from a plurality of preset heating modes according to the battery power under the condition that the battery temperature is less than or equal to a first preset temperature threshold; heating the power battery according to the target heating mode; and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, charging the power battery. Whether to heat the battery can be confirmed according to current battery temperature to can heat the target heating mode that the power battery selected the heating element that does not use to correspond according to different electric quantity, improve heating efficiency, and can also fix PTC heating mode as one of target heating mode, just so can make the vehicle just can guarantee to have the power consumption after being connected with external power source, can prevent like this that the condition that external power source was out overtime under the condition that no charging current was exported from appearing, can avoid the manual work to restart the charging flow, can improve charging efficiency, optimize user's experience of charging.
In some embodiments, the battery charging circuit is further configured to connect to an external power source; in case it is determined that the battery temperature is less than or equal to a first preset temperature threshold, a constant voltage indication message may be output to the external power source; and the power battery may be heated according to the target heating mode by the heating voltage output from the external power supply.
The constant voltage indication message is used for indicating an external power supply connected with the vehicle to periodically output heating voltage to the vehicle.
For example, the processor may output a constant voltage indication message to the external power source connected according to the battery temperature detected by the temperature detection assembly, in case it is determined that the battery temperature is less than or equal to a first preset temperature threshold, wherein the constant voltage indication message is used to instruct the external power source connected to the vehicle to periodically output a heating voltage to the heating assembly, and then the external power source may output a heating voltage to the heating assembly, in case it receives the constant voltage indication message, and may heat the power battery according to the target heating mode through the heating voltage output by the external power source.
By adopting the technical scheme, the battery can be connected with the external power supply, and under the condition that the battery temperature of the battery is small, the constant voltage indication message is sent to the external power supply, so that the power battery can be heated through the external power supply, the battery temperature can be improved, and the charging rate can be improved in the subsequent charging process.
In some embodiments, a constant current indication message may be output to the external power source in case it is determined that the battery temperature of the power battery is heated to a second preset temperature threshold.
The constant current indication message is used for indicating an external power supply connected with the vehicle to periodically output charging current to the power battery.
For example, the processor may output a constant current indication message to the connected external power source according to the battery temperature detected by the temperature detection assembly in case that it is determined that the battery temperature of the power battery is heated to a second preset temperature threshold, wherein the constant current indication message is used to indicate that the external power source connected to the vehicle periodically outputs a charging current to the vehicle, and then the external power source may output the charging current to the charging assembly in case that the constant current indication message is received.
In some embodiments, fig. 6 is a flowchart illustrating another battery charging method according to an exemplary embodiment, and as shown in fig. 6, the target heating mode further includes a heating mode in which the pulse self-heating mode and the PTC heating mode cooperate, and the above-described step S12 may include the following steps.
In step S121, power information of the external power supply is acquired.
In this step, the processor may further acquire power information of the external power source in case that the processor is connected to the external power source.
In step S122, a target heating mode is determined from among the pulse self-heating mode and the PTC heating mode according to the battery charge amount and the power information.
The heating assembly comprises a pulse self-heating assembly and a PTC heater, wherein the pulse self-heating assembly adopts a pulse self-heating mode for heating, and the PTC heater adopts a PTC heating mode for heating.
For example, in the case where it is determined that the battery charge of the power battery is insufficient, the battery may be heated by a mode in which a heating voltage is input to the PTC heater by an external power source, and in the case where it is determined that the battery charge of the power battery is greater than or equal to a preset charge threshold, a target heating mode may be determined from among the pulse self-heating mode of the pulse self-heating assembly and the PTC heating mode of the PTC heater according to the power information.
Alternatively, a heating mode in which the pulse self-heating mode and the PTC heating mode act together may be regarded as the target heating mode in the case where it is determined that the power information is greater than or equal to preset power information; or, in case that it is determined that the power information is less than the preset power information, the PTC heating mode is taken as the target heating mode.
For example, in the case that a heating mode in which the pulse self-heating mode and the PTC heating mode are combined is taken as the target heating mode, a first voltage may be supplied to the heating assembly through the power battery to control the heating assembly to heat the power battery according to the first voltage through the pulse self-heating mode; and providing a second voltage for the heating component through the heating voltage output by the external power supply so as to control the heating component to heat the power battery according to the second voltage through the PTC heating mode.
Optionally, the battery charging circuit further comprises a boost circuit; in the case of the PTC heating mode including only the PTC heater in the target heating mode, the heating voltage output from the external power supply may be first boosted by the booster circuit to obtain the boosted third voltage; then, the heating assembly is controlled to heat the power battery through the PTC heating mode by the third voltage.
By adopting the technical scheme, whether the battery is heated or not can be determined according to the current battery temperature, the power battery can be heated according to different electric quantity by selecting a heating mode corresponding to the unused heating assembly, and a charging control signal can be sent after the heating is finished, so that the situation that an external power supply exits overtime under the condition of no charging current output after the heating is finished can be prevented, the manual restarting of a charging process can be avoided, the charging efficiency can be improved, and the charging experience of a user is optimized.
Fig. 7 is a block diagram illustrating a battery charging apparatus 700 according to an exemplary embodiment. Referring to fig. 7, the apparatus includes a first processor 701; a memory 702 for storing first processor-executable instructions.
Wherein the first processor is configured, when executed, to implement the battery charging circuit disclosed in fig. 1 of the present disclosure.
Fig. 8 is a block diagram of a vehicle 800, according to an exemplary embodiment. For example, vehicle 800 may be a hybrid vehicle, but may also be a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other type of vehicle. Vehicle 800 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.
Referring to fig. 8, a vehicle 800 may include various subsystems, such as an infotainment system 810, a perception system 820, a decision control system 830, a drive system 840, and a computing platform 850. Vehicle 800 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, interconnections between each subsystem and between each component of the vehicle 800 may be achieved by wired or wireless means.
In some embodiments, infotainment system 810 may include a communication system, an entertainment system, a navigation system, and so forth.
The sensing system 820 may include several sensors for sensing information of the environment surrounding the vehicle 800. For example, the sensing system 820 may include a global positioning system (which may be a GPS system, or may be a beidou system or other positioning system), an inertial measurement unit (inertial measurement unit, IMU), a lidar, millimeter wave radar, an ultrasonic radar, and a camera device.
Decision control system 830 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.
The drive system 840 may include components that provide powered motion to the vehicle 800. In one embodiment, the drive system 840 may include an engine, an energy source, a transmission, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.
Some or all of the functions of vehicle 800 are controlled by computing platform 850. Computing platform 850 may include at least one second processor 851 and a first memory 852, where second processor 851 may execute instructions 853 stored in first memory 852.
The second processor 851 may be any conventional second processor, such as a commercially available CPU. The second processor may also include, for example, an image processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a System On Chip (SOC), an application specific integrated Chip (Application Specific Integrated Circuit, ASIC), or a combination thereof.
The first memory 852 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
In addition to instructions 853, the first memory 852 may store data such as road maps, route information, position, direction, speed, etc. of the vehicle. The data stored by the first memory 852 may be used by the computing platform 850.
In an embodiment of the present disclosure, the second processor 851 may execute instructions 853 to complete all or part of the steps of the battery charging method described above.
In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described battery charging method when executed by the programmable apparatus.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (19)

1. A battery charging circuit, characterized in that the battery charging circuit comprises a processor, a heating component, a charging component, a control switch component and a power battery of a vehicle, wherein the heating component and the charging component are respectively connected with the power battery, the heating component is connected with the control switch component, and the processor is respectively connected with the heating component, the charging component, the power battery and the control switch component, and the heating component at least comprises a PTC heater;
the processor is configured to obtain a battery temperature and a battery power of a vehicle power battery, and determine, according to the battery power, a target heating mode from a plurality of preset heating modes corresponding to the heating assembly by controlling the control switch assembly when it is determined that the battery temperature is less than or equal to a first preset temperature threshold, where the target heating mode at least includes a PTC heating mode corresponding to the PTC heater; and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, controlling the control switch assembly to enable the charging assembly to charge the power battery;
The heating assembly is used for heating the power battery according to the target heating mode according to the control switch assembly;
and the charging assembly is used for charging the power battery.
2. The circuit of claim 1, wherein the battery charging circuit is further configured to be connected to an external power source, wherein the processor and the heating assembly are each connected to the external power source;
the processor is further configured to output a constant voltage indication message to the external power supply, where the constant voltage indication message is used to instruct the external power supply connected to the vehicle to periodically output a heating voltage to the heating component, if the battery temperature is determined to be less than or equal to a first preset temperature threshold;
and the heating assembly is used for heating the power battery according to the heating voltage output by the external power supply according to the target heating mode by the control switch assembly.
3. The circuit of claim 2, wherein the charging assembly is further configured to connect with the external power source;
the processor is further configured to output a constant current indication message to the external power supply when it is determined that the battery temperature of the power battery is heated to a second preset temperature threshold, where the constant current indication message is configured to instruct the external power supply connected to the vehicle to periodically output a charging current to the vehicle;
And the charging assembly is used for charging the power battery through the charging current output by the external power supply.
4. The circuit of claim 2, wherein the heating assembly further comprises a self-pulsing heating assembly that heats in a self-pulsing heating mode;
the processor is further configured to obtain power information of the external power supply, and determine a target heating mode from a pulse self-heating mode of the pulse self-heating assembly and a PTC heating mode of the PTC heater according to the battery power and the power information, where the target heating mode further includes a heating mode in which the pulse self-heating mode and the PTC heating mode cooperate.
5. The circuit of claim 4, wherein the circuit further comprises a logic circuit,
the processor is used for determining a target heating mode from a pulse self-heating mode of the pulse self-heating assembly and a PTC heating mode of the PTC heater according to the power information under the condition that the battery electric quantity is determined to be greater than or equal to a preset electric quantity threshold value; or,
and taking the PTC heating mode of the PTC heater as a target heating mode under the condition that the battery electric quantity is smaller than a preset electric quantity threshold value.
6. The circuit of claim 5, wherein, in the event that the battery charge is determined to be greater than or equal to a preset charge threshold,
the processor is used for taking a heating mode which is used for combining the pulse self-heating mode of the pulse self-heating component and the PTC heating mode of the PTC heater as the target heating mode under the condition that the power information is larger than or equal to preset power information; or,
and taking the PTC heating mode of the PTC heater as the target heating mode when the power information is determined to be smaller than preset power information.
7. The circuit of claim 6, wherein the circuit further comprises a logic circuit,
in the case where the target heating mode includes a pulse self-heating mode of the pulse self-heating assembly and a heating mode of the PTC heater that co-act,
the power battery is used for providing a first voltage for the pulse self-heating assembly;
the external power supply is used for providing a second voltage for the PTC heater;
the pulse self-heating assembly is used for heating the power battery according to the first voltage in the pulse self-heating mode;
The PTC heater is used for heating the power battery according to the second voltage through the PTC heating mode.
8. The circuit of claim 5 or 6, wherein the battery charging circuit further comprises a boost circuit; the booster circuit is connected to the PTC heater and the external power supply, respectively, and in the case of a PTC heating mode including only the PTC heater among the target heating modes,
the boosting circuit is used for boosting the heating voltage output by the external power supply to obtain a boosted third voltage;
and the PTC heater is used for controlling the PTC heater to heat the power battery through the PTC heating mode through the third voltage after boosting.
9. A battery charging method, the method being applied to a battery charging circuit, the method comprising:
acquiring the battery temperature and the battery electric quantity of a vehicle power battery;
determining a target heating mode from a plurality of preset heating modes according to the battery power under the condition that the battery temperature is less than or equal to a first preset temperature threshold;
heating the power battery according to the target heating mode, wherein the target heating mode at least comprises a PTC heating mode;
And under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, charging the power battery.
10. The method of claim 9, wherein the battery charging circuit is further configured to connect to an external power source;
the determining a target heating mode from a plurality of preset heating modes according to the battery power comprises:
and outputting a constant voltage indication message to the external power supply, wherein the constant voltage request is used for indicating the external power supply connected with the vehicle to periodically output heating voltage to the vehicle.
11. The method of claim 10, wherein said heating the power cell according to the target heating pattern comprises:
and heating the power battery according to the target heating mode by the heating voltage output by the external power supply.
12. The method according to claim 10, wherein the method further comprises:
and under the condition that the battery temperature of the power battery is heated to a second preset temperature threshold value, outputting a constant current indication message to the external power supply, wherein the constant current indication message is used for indicating the external power supply connected with the vehicle to periodically output charging current to the power battery.
13. The method of claim 10, wherein the target heating mode further comprises a heating mode in which a pulsed self-heating mode and a PTC heating mode act together;
the determining a target heating mode from a plurality of preset heating modes according to the battery power comprises:
acquiring power information of the external power supply;
and determining a target heating mode from a pulse self-heating mode and a PTC heating mode according to the battery electric quantity and the power information.
14. The method of claim 13, wherein determining a target heating mode from a pulsed self-heating mode and a PTC heating mode based on the battery charge and the power information comprises:
determining a target heating mode from the pulse self-heating mode and the PTC heating mode according to the power information under the condition that the battery electric quantity is larger than or equal to a preset electric quantity threshold value;
and under the condition that the battery electric quantity is determined to be smaller than a preset electric quantity threshold value, taking the PTC heating mode as a target heating mode.
15. The method of claim 14, wherein determining a target heating mode from the pulsed self-heating mode and the PTC heating mode based on the power information comprises:
Taking a heating mode of the combined action of the pulse self-heating mode and the PTC heating mode as the target heating mode under the condition that the power information is larger than or equal to preset power information;
and in the case that the power information is determined to be smaller than preset power information, taking the PTC heating mode as the target heating mode.
16. The method of claim 15, wherein the battery charging circuit includes a heating assembly, the heating the power battery according to the target heating pattern comprising:
in the case where the target heating mode includes a pulse self-heating mode of the pulse self-heating assembly and a PTC heating mode of the PTC heater cooperate,
providing a first voltage for the heating assembly through the power battery so as to control the heating assembly to heat the power battery according to the first voltage in a pulse self-heating mode; and
and the heating voltage output by the external power supply provides a second voltage for the heating assembly so as to control the heating assembly to heat the power battery according to the second voltage through the PTC heating mode.
17. The method of claim 14 or 15, wherein the battery charging circuit further comprises a boost circuit; in the case of the PTC heating mode including only the PTC heater among the target heating modes,
the heating the power battery according to the target heating mode includes:
boosting the heating voltage output by the external power supply through the boosting circuit to obtain a boosted third voltage;
and controlling the heating component to heat the power battery through the PTC heating mode through the third voltage.
18. A battery charging apparatus, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to implement the battery charging circuit of any one of claims 1-8 when executed.
19. A vehicle comprising the battery charging device according to claim 18.
CN202311036109.6A 2023-08-16 2023-08-16 Battery charging circuit, method and device and vehicle Pending CN116901737A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118572837A (en) * 2024-07-29 2024-08-30 比亚迪股份有限公司 Battery charging method, controller, charging and discharging system, storage medium and vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118572837A (en) * 2024-07-29 2024-08-30 比亚迪股份有限公司 Battery charging method, controller, charging and discharging system, storage medium and vehicle

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